It is so difficult a problem that ____ student in this class ____ work it out.

Jack is taller than ______ boy in his class. 

--- Silly me! I forgot what my suitcase looks like.--- What do you think of ________ over there?

 Don’t you consider _____ funny to wear jewels borrowed from others to a party?

— It is said that Mr Jin was elected headmaster of the new school.— He is _____ hardworking that it is no surprise for him to get ______ post.